* The only file types for which we have to do variant * determination by looking at packets havemicrosecond* resolution; treat fractions-of-a-second values >= 1 000 000 * as an indication that the header format might not be * what we think it is. */ if (rec_hdr.hdr.ts_usec >= ...
文件头结构体 sturct pcap_file_header { DWORD magic; DWORD version_major; DWORD version_minor; DWORD thiszone; DWORD sigfigs; DWORD snaplen; DWORD linktype; } 说明: 1、标识位:32位的,这个标识位的值是16进制的 0xa1b2c3d4。 a 32-bit magic number ,The magic number has the value hex a1...
a UNIX-format time-in-seconds when the packet was captured, i.e. the number of seconds since January 1,1970, 00:00:00 GMT (that GMT, *NOT* local time!); the number of microseconds since that second when the packet was captured; Timestamp:时间戳高位,精确到seconds(值是自从January 1, ...
1、pcapng 报文文件格式全称”PCAP Next Generation Dump File Format” ,其定义为下一代通用的抓包报文格式。 2、pcapng报文文件是由一块一块数据组成,如下图所示,每一块有固定格式块类型+块长度+块内容组成。 其中块类型分类: 3、节标题块是.pcapng 文件类型标识,定义信息 /* pcapng: common block header fi...
#include <stdlib.h>#include<stdio.h>#include<pcap.h>#include<string.h>#include<netinet/in.h>#include<time.h>#include<syslog.h>/**.pcap file format = file header(24B) + pkt header(16B) + Frame * Frame = Ethernet header(14B) + IP header(20B) + UDP header(8B) + appdata*///...
pcap文件格式及文件解析
PCAP文件格式 每个.pcap文件的文件头Pcap Header:24B 每个.pcap文件中的数据包头 Packet Header:16B 每个.pcap文件中的数据报 Packet Data:14B以太头+TCP/IP数据 具体如下:1.pcap文件头部(pcap header)sturct pcap_file_header { DWORD magic;WORD version_major;WORD version_minor;DWORD thiszone;DWORD sig...
1、第一部分:PCAP包文件格式一 基本格式: 文件头 数据包头数据报数据包头数据报.二、文件头: 文件头结构体sturct pcap_file_header DWORD magic; DWORDversion_major; DWORDversion_minor; DWORDthiszone; DWORDsigfigs; DWORDsnaplen; DWORDlinktype;说明:1、标识位:32位的,这个标识位的值是16进制的 0xa1b2c...
第一部分:PCAP包文件格式 一基本格式: 文件头据包头据头据包头据头数数数数... 二、文件头: 文件头头构体 sturctpcap_file_header { DWORDmagic; DWORDversion_major; DWORDversion_minor; DWORDthiszone; DWORDsigfigs; DWORDsnaplen; DWORDlinktype; } 头明: 1、头头位:32位的,头头头位的头是个16头制...
sturct pcap_file_header{DWORD magic; WORD version_major; WORD version_minor;DWORD thiszone;DWORD sigfigs;DWORD snaplen;DWORD linktype;} 说明: 1、标识位:32位的,这个标识位的值是16进制的 0xa1b2c3d4。a 32-bit magic number ,The magic number has the value hex a1b2c3d4.2、主版本号:16位...